Piston-valve.



J. P. SCHILLER.

PISTON VALVE.

APPLICATION FILED PBB.14, 1911.

Patented July 4, 1911.

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IIIIII n J. P. SCHILLER.

PISTON VALVE. APPLICATION FILED F3114, 1911.

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Patented July 4, 1911.

. Swumtoz Jasqai''czller To al l{ whom it may concern:

S 1 E! i JOSEPH F. SCHILLER, or PHILADELPHIA, PENNSYLVANIA.

.rzsromvanyn.

Be itknown that I, JOSEPH F. SCHILLER, a citizen of'the United States,residing at Philadelphia, in the -c'ertain'new vand useful Improvementsin p 'l to that particular use, water or other fluid.

A further object is to provide an improved construction of doubleeccentric rings oppositely disposed one within the other,

-.provide improved means preventing inderangements of parts,

pendent movement of either ring.

lVith these and other objects'in view, the invention consists in certainnovel features of constructio'n and combinations and aras will be morefully hereinafter described and pointed out in the claim.

In'the accompanying drawings: Figure 1, is a view in side elevationillustrating my improvements. Fig. 2, is a View in longitudinal section.Fig. 3, is an end view. Fig. 4, is a view in section on the line l4 ofFig.2, and Figs. 5, and 6, are perspective views of the packing rings.

1, represents a rod having an integral shoulder 2 thereon, against whichone head 3 of my improved piston valve is secured by means of nuts 4screwed on to a threaded portion 5 of said rod. This head 3 thereforehas a fixed relation to the rod. The other head 6", however, of the'piston valve, is secured between nuts 7 and be adjusted longitudinallyof the rod, and insure the proper positioning of the heads 3 and 6, soas to properly cut off the ports.

Both of the heads 3 and 6 are provided in the outer faces withSpecification of Letters Patent. Application filed February 14, 1911.Serial No. 608,642.

county of Philadelphia and State of Penn'svlvania, have invented whichthe following is a.

and

I with the casing 8, so that it mayannular grooves 9, and rings 10cooperate with flanges 11, const1tut-' Patented Ju1 4, 1911.

ing walls of said grooves, to confine between them, my improved packingrings 12 and 13. The rings 10 are fnade with circular flanges 14 whichproject into recesses 15, and between the rings 10 and the inner wallsof the recesses 15, rings or washers 16 are interposed. Screws 17 extendthrough the rings 10, and washers 1G, and are screwed into threadedsockets 17 in the heads 3 and 6 to clamp the rings 10 and confine thepacking rings 12 and 13. The packing rings 12 and 13 are each eccentric,in other words, they are thickest at-their intermediate portions andtaper toward-their ends. Both rings are split, the meeting ends of rings12 having a lap joint as shown at 18, and a section 19 is cutfrom thethinnest portion of ring 13, and is secured by a rivet 20 to the innerface of ring 12 at the thickest portion of the latter, so that when therings are assembled, ring 13 within ring 12 as shown in Fig. 4, thesection 19 prevents any independent r0.-

tary movement of either ring, which wouldv tend to jam. Both rings arehowever, permitted free expansion, and maintain a circular exteriorconcentric with the valve which is maintained in tight engagement (notshown). The double eccentric rings form circles interiorly andexteriorly, they expand equally in all directions, they center thepiston valve in the cylinder, and they form a perfectly steam tightjuncture'with the casing, the lap joint 18 preventing any passage of thesteam through the rings.

Various slight changes might be made in the general form and arrangementof parts described without departing from my invention, and hence I donot limit myself to the precise details set forth, but consider myselfat liberty to make such changes and alterations as fairly fallwithinthespirit and scope of the appended claim.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

A packing comprising an inner and an outer ringsaidrings both eccentric,thickest at their intermediate portions and tapering to their ends, aplate secured to the inner face of the outer ring at its thickerportion, and looai'ed between the ends of the inner ring, said plateconstituting a section cut from the thinnest portion of said inner ringand said outer ring out at its thinner portion forming a lap joint,substantially as de scribed.

R. H. KRENKEL, CHARLES E. Po'r'rs.

